It appears engine revs killed my Sanden rotary compressor. That or it was a cheaper build. Regardless, my new motor will rev even higher and this time I am installing a high-pressure shut-off valve. In addition, I'd like to use the rev limiter feature of the 6AL to shut off the compressor so I won't kill another one. I have heard of such a mod but have not seen technically how to make it work. Anybody know what MSD parts are needed and how to hook it up to the A/C? Rob It appears engine revs killed my Sanden rotary compressor.A That or it was a cheaper build.A Regardless, my new motor will rev even higher and this time I am installing a high-pressure shut-off valve.A In addition, I'd like to use the rev limiter feature of the 6AL to shut off the compressor so I won't kill another one. I have heard of such a mod but have not seen technically how to make it work.A Anybody know what MSD parts are needed and how to hook it up to the A/C? RobA